Fred Saberhagen - Dracula Series

Dracula sequence
The Dracula Tapes (1975)
The Holmes-Dracula File (1978)
An Old Friend of the Family (1979)
Thorn (1980)
Dominion (1997)
A Matter of Taste (1990)
A Question of Time (1992)
Seance for a Vampire (1994)
A Sharpness on the Neck (1996)